[server-1551] replaced sorting with compareVersions method.

- replaced sorting with compareVersions method.
- added datatable custom sort options.

Author: frknbasaran

frontend/express/public/javascripts/countly/countly.template.js

@@ -2650,6 +2650,55 @@ var AppRouter = Backbone.Router.extend({
             return ((x < y) ? 1 : ((x > y) ? -1 : 0));
         };
 
+        function compareVersions(a, b) {
+            var aParts = a.split('.');
+            var bParts = b.split('.');
+        
+            for (var i = 0; i < aParts.length && i < bParts.length; i++) {
+                var aPartNum = parseInt(aParts[i], 10);
+                var bPartNum = parseInt(bParts[i], 10);
+        
+                const cmp = Math.sign(aPartNum - bPartNum);
+        
+                if (cmp !== 0) {
+                    return cmp;
+                }
+            }
+        
+            if (aParts.length === bParts.length) {
+                return 0;
+            }
+        
+            let longestArray = aParts;
+            if (bParts.length > longestArray.length) {
+                longestArray = bParts;
+            }
+        
+            const continueIndex = Math.min(aParts.length, bParts.length);
+        
+            for (let i = continueIndex; i < longestArray.length; i += 1) {
+                if (parseInt(longestArray[i], 10) > 0) {
+                    return longestArray === bParts ? -1 : +1;
+                }
+            }
+        
+            return 0;
+        }
+
+        jQuery.fn.dataTableExt.oSort['app_versions-asc'] = function(x, y) {
+            var versions = [];
+            versions.push(x);
+            versions.push(y);
+            return versions.sort(compareVersions);
+        }
+
+        jQuery.fn.dataTableExt.oSort['app_versions-desc'] = function(x, y) {
+            var versions = [];
+            versions.push(x);
+            versions.push(y);
+            return versions.sort(compareVersions);
+        }
+
         jQuery.fn.dataTableExt.oSort['format-ago-asc'] = function(x, y) {
             return x - y;
         };

frontend/express/public/javascripts/countly/countly.views.js

@@ -1638,21 +1638,6 @@ window.AppVersionView = countlyView.extend({
                         "mData": "app_versions",
                         "sTitle": jQuery.i18n.map["app-versions.table.app-version"],
                         "mRender": function(d, type) {
-                            if (type === "sort") {
-                                var numbers = d.split(".");
-                                var sortValue = 0;
-                                var multipler = 10000;
-                                for (var index in numbers) {
-                                    var valueArr = numbers[index].split("");
-                                    if (valueArr.length > 1) {
-                                        valueArr.splice(1, 0, '.');
-                                        numbers[index] = parseFloat(valueArr.join(""));
-                                    }
-                                    sortValue += multipler * parseFloat(numbers[index]);
-                                    multipler = multipler / 100;
-                                }
-                                d = sortValue;
-                            }
                             return d;
                         }
                     },